Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
Processing...

Test String

Code Generator

Language

Generated Code

$re = '/(?:\n[\h]*@|^[\h]*@)\K([0-9]+)(?=[\s]*\n|[\s]*$)|(?<=[\h\n,]@)([0-9]+)(?=[\h\n,.-]|$)|(?<=[\s,]@|^@)\K([a-zA-ZæøåÆØÅ_0-9]*[a-zA-ZæøåÆØÅ_]+[a-zA-ZæøåÆØÅ_0-9]*+)(?=[\s,]|[-.,:]*[\s]|[-.,:]*$)/'; $str = ' @ab. # ^ match at start of string # GROUP 1 @0123456789 @9412334 @00000 @999 @123 @123 # GROUP 2 ,@123 @123,@123,@123 asdasd,@4782,asdada @31, @2312, @1231 @123 @123 @1234567890 @123.-, @123. # GROUP 3 @abdefghijklmnopqrstuæøå @ABCDEFGÆØÅ @123abc @abc123 @123abc123 @abc. @abc- @abc: # NO MATCH @ .@412 -@634 @5234; @4234@ @@1231 test@example.com test@example @asd@asd asd@as-_d @asd.@asd.@asd @asd-d @ads.com @ads-_ @asd^ @asdf Loreæøåm ipasdæøåsumæø dolor sit amet, consectetur adipisicing elit, sed do eiusmod @1234567890 @1 @0 tempor incididunt ut labore @1æøåÆØÅ123et0 dolore magna aliqua. Ut enim ad minim @veniam, @quis @nostrud @123 exercitation ullamco laboris nisi ut aliquip ex ea @commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit æøå esse cillum dolore @asd,@asd,@asd eu fugiat nulla test@example.com pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. # v Match at end of string @ab.'; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php